Identification of white spot disease (white spot disease) in wild Indian white shrimp (Fenneropenaeus indicus) in Sistan and Baluchestan Province

White spot disease (WSD) is the most important viral diseases in shrimp Penaeidae family. However, no study has been done on wild Indian white shrimp brooder species (Fenneropenaeus indicus) in capture sites in Sistan-Baluchestan province, yet. The aim of this study was to evaluate the prevalence of WSSD in different seasons of captures in this province by molecular and pathologic methods. Out of 451 samples, 25 samples and 4 samples were found positive by molecular and
histopathology respectively. The rate of infection in the spring was significantly higher than in autumn. Prevalence rate in Pasabandar, Chabahar and Gwadar significantly increased, whereas no significant relationship was observed between gender and the size of the shrimp with white spot infection. Basophilic nuclear inclusion bodies were seen within the pillar cells in the secondary gill lamellae tissue and the severity of the infection was diagnosed grade two. High levels of pollution in the region of Gwadar due to infected shrimps in this region farms which entered the sea, On the other hand in Chabahar, one of the country's commercial ports, high prevalence of WSSD is due to ships that carry fouling organisms and discharge ballast water sail to these areas. It seems that attention to capturing sites and lack of collecting broodstock in the spring season be necessary to prevent the spread of disease